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astromark
2011-Apr-08, 07:32 AM
http://www.xinhuanet.com/english2010/

This might be the first time I have added a link directly., or correctly. or not.:doh:
I intend this to be of some interest as its about finding very young active stars
near here. It seems to be working.
X ray and ultra violate light and at the other end of visible spectrum info red.
All with thanks from the NASA GEE satellite.

No. I am not being pleased with that link.. its turned to custard. It was a news feed I use and now has changed. Sorry.
So I will ask for a better computer skilled fellow to come striding in and post what my now useless post was meant to be.
Information being gained from NEW method. Using the NASA GLEE space craft. I'm off to coffee. mumble, mumble, mumble.. :(Sorry.

so I cut and past... and still wonder if this might work... With mention and thanks to the " Xinhua " site.
Quote; ...
U.S. astronomers hunt for nearby stars with new technology
English.news.cn 2011-04-08 07:59:11 FeedbackPrintRSS
LOS ANGELES, April 7 (Xinhua) -- Using NASA's Galaxy Evolution Explorer (GEE) satellite, U.S. astronomers are hunting for nearby, hard-to-see stars which could very well be home to the easiest-to-see alien planets, it was announced on Thursday.

U.S. astronomers are ferreting out the new targets after the glare of bright, shining stars has frustrated most efforts at visualizing distant worlds, NASA's Jet Propulsion Laboratory (JPL) said.

So far, only a handful of distant planets, or exoplanets, have been directly imaged. Small, newborn stars are less blinding, making the planets easier to see, but the fact that these stars are dim means they are hard to find in the first place.

"Fortunately, the young stars emit more ultraviolet light than their older counterparts, which makes them conspicuous to the ultraviolet-detecting GEE," JPL said in a press release.

"We've discovered a new technique of using ultraviolet light to search for young, low-mass stars near the Earth," said David Rodriguez, a graduate student of astronomy at University of Californian, Los Angeles. "These young stars make excellent targets for future direct imaging of exoplanets."

Young stars, like human children, tend to be a bit unruly -- they spout a greater proportion of energetic X-rays and ultraviolet light than more mature stars. In some cases, X-ray surveys can pick out these youngsters due to the "racket" they cause. However, many smaller, less "noisy" baby stars perfect for exoplanet imaging studies have gone undetected except in the most detailed X-ray surveys. To date, such surveys have covered only a small percentage of the sky, according to JPL in Pasadena, Los Angeles.

Rodriguez and his team figured that the GEE, which has scanned about three-quarters of the sky in ultraviolet light, could fill this gap.

Astronomers compared readings from the telescope with optical and infrared data to look for the telltale signature of rambunctious junior stars. Follow-up observations of 24 candidates identified in this manner determined that 17 of the stars showed clear signs of youth, validating the team's approach, JPL said.

"The Galaxy Evolution Explorer can readily select young, low- mass stars that are too faint to turn up in all-sky X-ray surveys, which makes the telescope an incredibly useful tool," Rodriguez said in the release.

Editor: Xiong Tong ... With permission and thanks. Mark Lee

slang
2011-Apr-08, 02:52 PM
Link to the orignal story, in case anyone still wants or needs the reference. U.S. astronomers hunt for nearby stars with new technology (http://news.xinhuanet.com/english2010/sci/2011-04/08/c_13818004.htm)

IMHO the title is misleading: The technology (the satellite itself) is 8 years old. The text of the article mentions a new technique, which isn't quite the same. It will be interesting to see if they do find planets that way.

While I'm at it... :
GALEX Caltech website (http://www.galex.caltech.edu/)
NASA - Galaxy Evolution Explorer (http://www.nasa.gov/centers/jpl/missions/galex.html)
GALEX Wikipedia page (http://en.wikipedia.org/wiki/GALEX)

A previous BAUT topic: Cool stuff from GALEX (http://www.bautforum.com/showthread.php/37001-Cool-stuff-from-GALEX)

grapes
2011-Apr-08, 05:59 PM
What? software is not technology? :)